Police arrest, spray protesters at Mich. Capitol

David Dudenhoefer, left, a right to work supporter, receives a thumbs down sign from a union worker during a rally in Lansing, Mich., Thursday, Dec. 6, 2012. Tensions rose at the Capitol late Wednesday afternoon when hundreds of union members packed into the rotunda area, blowing whistles and shout

/ AP

David Dudenhoefer, left, a right to work supporter, receives a thumbs down sign from a union worker during a rally in Lansing, Mich., Thursday, Dec. 6, 2012. Tensions rose at the Capitol late Wednesday afternoon when hundreds of union members packed into the rotunda area, blowing whistles and shouting slogans such as "Union buster" and "Right to work has got to go." Senate Republicans introduced right-to-work legislation in the waning days of the legislative session as outnumbered Democrats pledged to resist the proposal and say rushing it through would poison the state's political atmosphere. (AP Photo/Carlos Osorio)

David Dudenhoefer, left, a right to work supporter, receives a thumbs down sign from a union worker during a rally in Lansing, Mich., Thursday, Dec. 6, 2012. Tensions rose at the Capitol late Wednesday afternoon when hundreds of union members packed into the rotunda area, blowing whistles and shouting slogans such as "Union buster" and "Right to work has got to go." Senate Republicans introduced right-to-work legislation in the waning days of the legislative session as outnumbered Democrats pledged to resist the proposal and say rushing it through would poison the state's political atmosphere. (AP Photo/Carlos Osorio) (/ AP)

The Associated Press

Michigan State Police say they have used chemical spray on right-to-work protesters who to tried rush into the Senate chamber at the state Capitol, and minority Democrats in the Legislature accuse Republican leaders of taking a "shameful step" to undermine free speech.

State police Inspector Gene Adamczyk says eight people were arrested for resisting and obstructing when they tried to rush past two troopers guarding the Senate door Thursday. He says the troopers used chemical spray after the people refused orders to stop.

Adamczyk says the Capitol was temporarily closed because of safety concerns. He estimates about 2,500 visitors were at the Capitol.

A state Democratic Party statement says Republicans are showing "their true colors" and "shutting down dissent."

The Associated Press left a message seeking comment from Republican leaders.